Healey invoked the extensive work the MBTA conducted during her administration to fix Green Line Extension rails, saying they weren't the cause of the T derailment on Tuesday. She said federal investigators are focusing on other factors,

Gov. Maura Healey said the Tuesday afternoon derailment on the Green Line is "not attributable to the rail or the track," and suggested that federal investigators are instead focusing on other factors including the operator as a potential root cause.

Firefighters said several people are being evaluated for injuries after a Green Line train derailed in Cambridge.

The MBTA is investigating how “human factors,” including the train operator’s action, could have been involved with the incident. The post Train operator might have caused Green Line train derailment at Lechmere,